<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Vue 生命周期</title>
  </head>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
  <body>
    <h1>Hello Vue 生命周期</h1>
    <hr />
    <div id="app">
      {{count}}
      <p><button @click="add">add</button></p>
    </div>
    <p><button onclick="destroy()">销毁</button></p>
  </body>

  <script>
    function destroy () {
      app.$destroy()
    }
    var app = new Vue({
      el: '#app',
      data: {
        count: 1
      },
      methods: {
        add: function () {
          this.count++
        }
      },
      beforeCreate: function () {
        console.log('1-beforeCreate 初始化之前')
      },
      created: function () {
        console.log('2-created 创建完成')
      },
      beforeMount: function () {
        console.log('3-beforeMount 挂载之前')
      },
      mounted: function () {
        console.log('4-mounted 挂载之后')
      },
      beforeUpdate: function () {
        console.log('5-beforeUpdate 数据更新前')
      },
      updated: function () {
        console.log('6-updated 被更新后')
      },
      activated: function () {
        console.log('7-activated')
      },
      deactivated: function () {
        console.log('8-deactivated')
      },
      beforeDestroy: function () {
        console.log('9-beforeDestroy 销毁之前')
      },
      destroyed: function () {
        console.log('10-destroyed 销毁之后')
      }
    })
  </script>
</html>
